Frontiers of Engineering Reports on Leading-Edge Engineering from the 2009 Symposium (2010) / Chapter Skim
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Engineering Tools for Studying Marine Mammals--Sean M. Wiggins
Engineering Tools for Studying Marine Mammals--Sean M. Wiggins
Pages 13-22
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From page 13... ...
However, because whales and dolphins spend as much as 95 percent of their time below the sea surface and beyond visual range, traditional methods require years to decades of effort to provide enough data for the development of ecological and behavioral models. Fortunately, because these animals often use sound while submerged to sense their environment, communi cate with each other, and find food by echolocation, acoustic monitoring methods can provide rich data sets for studying them.
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From page 14... ...
This paper describes technologically advanced devices used for tagging and acoustic monitoring and some of the challenges of making measurements with these tools in the ocean environment. TAGS Tags for studying whales and dolphins have various capabilities: pressure sensors for measuring depth; global positioning system (GPS)
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From page 15... ...
suction cups on B-probe (acoustic, depth, 3-axis acceleration tag) , tag attachment on blue whale using pole, and two-hour dive profiles from a tagged fin whale offshore of southern California..
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From page 16... ...
One solution my group is working on is to increase data storage capacity while lowering power consumption by replacing the hard disk drives with solidstate memory (NAND flash) , a type of data storage that has been shown with time to decrease in price and increase in capacity.
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From page 17... ...
The autonomous data logger consists of low-power electronics including 200 kSample/sec analog-to-digital converter, low drift (10 -8) clock, and about 2 TB of data storage on 16 laptop-style hard disk drives.
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From page 18... ...
In the future, our approach to the problem of running multiple detectors on large data sets will be to use multiple processors arranged in clusters that can access the same data nearly simultaneously. We believe this will provide more efficient detections of a wide range of animal and anthropogenic sounds.
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From page 19... ...
(A) Five-second spectrogram shows dolphin clicks from about 25 kHz up to 100 kHz, dolphin whistles from about 8 kHz to more than 20 kHz, and man-made sonar around 3 kHz.
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From page 20... ...
for long-term monitoring of biological and anthropogenic sounds on coral reefs and other marine habitats. Journal of the Acoustical Society of America 123(3)
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From page 21... ...
2007. Temporal separation of blue whale call types on a southern California feeding ground.
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